Question: when did lyudmila zubovich tenure as the head of government of barnaul come to an end?
Paraphrase: Lyudmila Zubovich's was no longer head of government of Barnaul as of what date?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q6014 p:P6 ?s . ?s ps:P6 wd:Q4194399 . ?s pq:P582 ?value}